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high-order bit set", as this error is obsolete. Eventually we may want to add code to some of the "optional" filesystems (msdosfs, etc.) that checks for illegal characters. At that time it would be appropriate to reintroduce this error with appropriate text. Perhaps "The pathname contains a character that is not valid for filesystem type".
98 lines
3.3 KiB
Groff
98 lines
3.3 KiB
Groff
.\" Copyright (c) 1983, 1991 The Regents of the University of California.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" from: @(#)readlink.2 6.8 (Berkeley) 3/10/91
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.\" $Id: readlink.2,v 1.6 1994/04/22 00:13:44 jtc Exp $
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.\"
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.Dd March 10, 1991
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.Dt READLINK 2
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.Os BSD 4.2
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.Sh NAME
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.Nm readlink
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.Nd read value of a symbolic link
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.Sh SYNOPSIS
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.Fd #include <unistd.h>
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.Ft int
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.Fn readlink "const char *path" "char *buf" "int bufsiz"
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.Sh DESCRIPTION
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.Fn Readlink
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places the contents of the symbolic link
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.Fa path
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in the buffer
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.Fa buf ,
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which has size
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.Fa bufsiz .
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.Nm Readlink
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does not append a
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.Dv NUL
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character to
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.Fa buf .
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.Sh RETURN VALUES
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The call returns the count of characters placed in the buffer
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if it succeeds, or a -1 if an error occurs, placing the error
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code in the global variable
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.Va errno .
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.Sh ERRORS
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.Fn Readlink
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will fail if:
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.Bl -tag -width Er
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.It Bq Er ENOTDIR
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A component of the path prefix is not a directory.
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.It Bq Er ENAMETOOLONG
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A component of a pathname exceeded
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.Dv {NAME_MAX}
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characters, or an entire path name exceeded
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.Dv {PATH_MAX}
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characters.
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.It Bq Er ENOENT
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The named file does not exist.
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.It Bq Er EACCES
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Search permission is denied for a component of the path prefix.
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.It Bq Er ELOOP
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Too many symbolic links were encountered in translating the pathname.
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.It Bq Er EINVAL
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The named file is not a symbolic link.
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.It Bq Er EIO
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An I/O error occurred while reading from the file system.
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.It Bq Er EFAULT
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.Fa Buf
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extends outside the process's allocated address space.
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.El
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.Sh SEE ALSO
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.Xr stat 2 ,
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.Xr lstat 2 ,
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.Xr symlink 2
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.Sh HISTORY
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The
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.Fn readlink
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function call appeared in
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.Bx 4.2 .
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